/Engine/Source/Editor/MainFrame/Public/Interfaces/IMainFrameModule.h
Generates a menu that's just like the "main menu" widget above, except it also includes some infrequently used commands that are better off only shown in a single "main tab" within the application
The newly-created menu widget
[TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > MakeDeveloperTools ( const [TArray](API\Runtime\Core\Containers\TArray)< [FMainFrameDeveloperTool](API\Editor\MainFrame\Interfaces\FMainFrameDeveloperTool) > & AdditionalTools ) const